There are even more guest artists to look forward to. In fact, Justin Bieber and Usher hinted at future duets via Twitter.

Earlier this morning Perez Hilton told B96/Chicago that the Justin Bieber/Usher duets are the real deal. “We’re getting closer and closer to the release of Bieber’s next album, and he is giving more hints as to what we can expect,” Perez said. “Included on that is a duet with Usher, his mentor, and also the Biebs tells us that there will be a duet on Usher’s album. So there will be two new songs featuring Bieber and Usher.”

When Justin Bieber tweeted about going to a cover shoot with Usher, he also mentioned the duets.

now headed to a COVER SHOOT with big bro @UsherRaymondIV – we got duets on both of our albums coming

According to Rolling Stone, Believe will also include contributions from Kanye West, Drake, Timbaland and Diplo. Bieber’s album Believe will be released sometime this summer, while Usher’s Looking For Myself will arrive June 12.